A method to repair an opening in a metallic device including: mount the device on a positioner; while the device is mounted on the positioner, sense and record positions of a surface of an opening in the device using a probe operated by a manipulator; based on the recorded positions determine a centerline and diameter of the opening; orient a digital model of the opening with respect to the opening of the device based on the centerline and diameter of the opening, and apply an weld or cladding to the opening by a welding torch maneuvered automatically by the manipulator while the device is mounted to the positioner and based on the oriented digital model of the opening.

A welder power supply and welding method are provided which utilizes a short arc welding method in which the waveforms have a positive polarity portion and negative portion to optimize heat input and provide heat and current control.

A system and method is provided. The system includes a first power supply that outputs a welding current that includes welding pulse currents and a background welding current. The system also includes a second power supply that outputs a heating current that includes first heating pulse currents at a first polarity and second heating pulse currents at an opposite polarity. The system also includes a controller that synchronizes at least one of the first heating pulse currents and the second heating pulse currents with at least one of the welding pulse currents and the background current to influence a position of an arc relative to a molten puddle based on magnetic fields created by the welding current and the heating current.

A welding system configured to eliminate effects of arc blow in a welding operation. The welding system comprises welding circuitry, preheat circuitry, and control circuitry configured to switch the welding circuitry and the preheat circuitry between power levels asynchronously during the welding operation. The control circuitry configured to switch the welding circuitry and the preheat circuitry between power levels asynchronously such that the preheat circuitry is switched to the second preheat power level when the welding circuitry is switched to the first welding power level and the preheat circuitry is switched to the first preheat power level when the welding circuitry is switched to the second welding power level.

A system for controlling a weld-current in an arc welding apparatus for short arc welding comprising a current regulator included in a voltage feedback loop from a power supply to a welding electrode and a ramp generator arranged to provide current ramps during a short circuit phase at said welding electrode.

A method and apparatus for providing welding-type power that alternates between at least a hotter and a colder process is disclosed.

A welding or cutting device includes an internal combustion engine coupled to a generator for generating electrical power. A welding or cutting power supply is powered by the generator. The welding or cutting power supply supplies a welding or cutting output signal. An auxiliary outlet circuit is configured to receive power from the generator. The auxiliary outlet circuit includes at least one auxiliary load outlet. A controller controls an engine speed of the internal combustion engine. The controller is configured to determine an anticipated load on the generator to be supplied through the auxiliary load outlet, based on a no load condition of the auxiliary load outlet, and adjust an idle speed of the engine based on the anticipated load. The controller is further configured to subsequently increase the engine speed, from the idle speed to an auxiliary load speed, when the generator supplies power through the auxiliary load outlet.

A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal and converts the first DC output signal to a second DC output signal of the second stage; and a third stage to convert the second DC output signal to a welding output for welding wherein the input stage and the second stage are assembled into a first module within a first housing structure and the third stage is assembled into a second module having a separate housing structure connectable to the first module with long power cables. The second module also includes wire feeding systems and electronics.

A method and system to manufacture workpieces employing a high intensity energy source to create a puddle and at least one resistively heated wire which is heated to at or near its melting temperature and deposited into the puddle as droplets.

A relationship between an average current (I.sub.P-AVE) of a current non-suppression period (T.sub.IP) and an average current (I.sub.B-AVE) of a current suppression period (T.sub.IB) is set as 0.65?I.sub.P-AVE/(I.sub.P-AVE+I.sub.B-AVE)?0.90, a relationship between any current non-suppression period (T.sub.IP) and the current suppression period (T.sub.IB) immediately after is set as 0.30?T.sub.IB/(T.sub.IP+T.sub.IB)?0.60, a relationship between a forward feeding period (T.sub.P) and a reverse feeding period (T.sub.N) is set as 0.40?T.sub.N/(T.sub.P+T.sub.N)?0.70, a relationship between the current non-suppression period (T.sub.IP), the current suppression period (T.sub.IB), the forward feeding period (T.sub.P), and the reverse feeding period (T.sub.N) is set as {T.sub.N/(T.sub.P+T.sub.N)}>{T.sub.IB/(T.sub.IP+T.sub.IB)}, and the current non-suppression period (T.sub.IP) is controlled to account for ? or more of the forward feeding period (T.sub.P).